A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2914600 can be evenly divided by 1 2 4 5 8 10 13 19 20 25 26 38 40 50 52 59 65 76 95 100 104 118 130 152 190 200 236 247 260 295 325 380 472 475 494 520 590 650 760 767 950 988 1,121 1,180 1,235 1,300 1,475 1,534 1,900 1,976 2,242 2,360 2,470 2,600 2,950 3,068 3,800 3,835 4,484 4,940 5,605 5,900 6,136 6,175 7,670 8,968 9,880 11,210 11,800 12,350 14,573 15,340 19,175 22,420 24,700 28,025 29,146 30,680 38,350 44,840 49,400 56,050 58,292 72,865 76,700 112,100 116,584 145,730 153,400 224,200 291,460 364,325 582,920 728,650 1,457,300 and 2,914,600, with no remainder.
Since 2,914,600 cannot be divided by just 1 and 2,914,600, it is not a prime number.